Hiram Maxim, the inventor of the automatic machine gun, spent so much time test-firing his guns that he became completely deaf. His son Hiram Percy Maxim eventually invented the silencer, but too late to save his father’s hearing.
From the FCS Book of Little-Known Facts
The Flippant, Comic, and Serious 
The price one pays for innovation. Eventually silence all around for the inventor, but the world reels under the thunder……….
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